JPH10169191A - Joining structure of steel material and bushing used for the same structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute easily steel material integrated joining work without demanding for troublesome work and contrive to definite stress transmission even when the relative positions of the mutually joined steel pipes are deviated. SOLUTION: Penetration holes 9 and 10 are formed on connecting plates 7 and 8 at matching positions with steel shells 1A, 1A or connecting materials 3 respectively. A bushing 11 is fitted in the respective penetration holes 9 and 10. An insertion hole 13, which extends in the axial direction shifted to the rotary center, is formed in the bushing 11. When the bushings 11 and 12 are rotated, the absolute position of the insertion hole 13 varies, centering on the rotary center. Even when the positions between the penetration hole on the side of a segment and the penetration hoe of the connecting material 3 are deviated, it is possible to match the insertion holes 13 formed respectively by turning the bushings 11, 12 properly. A bolt is inserted into the insertion holes 13 so that the bolt may be fastened with a nut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a joint structure of steel material and a bushing used for the same, and more particularly, to a tunnel lining body formed by installing a plurality of pieces along an inner peripheral surface of a tunnel excavation. Joint structure for joining segments to be joined to each other at the contact surface of an adjacent segment, or joint structure for joining plates integrated together to join a column and a beam, and a truss TECHNICAL FIELD The present invention relates to a joining structure for joining steel materials to construct a main structure of a type bridge and a bushing used for the joining structure.

[0002]

2. Description of the Related Art In particular, in the field of urban civil engineering, a shield method is known as a method for excavating and forming a tunnel in the ground. This shield method uses a cylindrical shield excavator equipped with a cutting cutter at the tip, advances it and excavates the tunnel, and along the inner surface of the tunnel excavation, a number of By installing the segments, the tunnel is constructed while forming the tunnel lining body.

[0003] In recent years, a shield construction method using a rectangular section shield excavator has been developed for the purpose of effectively utilizing the excavation section of the shield machine. To form a lining body covering the inner peripheral surface of the excavation of the tunnel.

[0004] After a plurality of tunnels having a rectangular cross section constructed by such segments are excavated and formed along the outer peripheral portion of the planned cross section, water is stopped between adjacent segments and excavated. The main structure is constructed by laying concrete at the connection portion and placing concrete, and by excavating the internal space covered by the main structure, a large underground structure (road tunnel, railway tunnel, A construction method for constructing an underground parking lot or the like is known.

[0005] As a method of connecting two adjacent segments, reinforcing steel is arranged so as to straddle between the two segments, concrete is poured, or a steel material straddling between the side portions of the two segments is applied to each of the segments. A bolt hole formed in a contact portion between a segment and a steel material is aligned, a bolt is inserted into both bolt holes, and a bolt is tightened by tightening a nut.

[0006]

By the way, in order to firmly join two adjacent segments and to ensure the transmission of stress, it is necessary to increase the number of reinforcing bars in the former method using concrete casting. However, in the latter method of joining bolts, it is necessary to increase the thickness of the steel material and the number of bolted portions.

However, according to such a segment joining method, it takes time and effort to align the bolt holes on the contact surfaces of the adjacent segments, and a cross-sectional defect due to the bolt holes on the contact surfaces. Will occur. Moreover, since the relative positions of adjacent segments often cause a height difference due to construction errors or move away from or approach the design position, even if bolt holes are formed in advance, they can be aligned. It can be difficult.

[0008] Such a problem is caused not only by the joining structure of the segments described above, but also by a joining structure for joining plates integrated respectively to join columns and beams to each other.
Further, the same occurs in a joint structure of steel materials such as a joint structure in which steel materials are joined to construct a main structure of a truss-type bridge.

The present invention has been made in view of such a conventional problem, and requires time-consuming work even when the relative positions of steel materials to be joined to each other are shifted. It is an object of the present invention to provide a steel material joining structure capable of easily performing integrated joining operation of steel materials without fail and transmitting a reliable stress, and a bushing used for the same.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to claim 1 has the following requirements (1) to (3). The present invention relates to a joining structure of steel materials, wherein a plurality of steel materials are joined in a close facing state. (1) One or a plurality of through holes are formed in each steel material, and at least one of the through holes is located at an overlapping portion of the steel materials when the steel materials to be joined to each other are overlapped. . The through hole has a circular cross section. (2) The bushing is rotatably housed in at least one of the facing steel materials in the through-hole located at the overlapping portion of the steel materials joined to each other. The outer diameter of the bushing is substantially the same as the inner diameter of the through hole. The bushing has an insertion hole eccentric to the rotation shaft. (3) A joint such as a pin, a rivet, or a bolt is inserted across a plurality of insertion holes in a state where the insertion holes of the bushings provided in at least one of the steel materials to be joined are aligned. Will be

According to a second aspect of the present invention, there is provided a steel member joining structure which has the following requirements (1) to (3) and is characterized in that a plurality of steel members are joined in a face-to-face state close to or close to each other. It is about. (1) One or a plurality of through holes are formed in each steel material, and at least one of the through holes is located at an overlapping portion of the steel materials when the steel materials to be joined to each other are overlapped. . The through hole has a circular cross section. (2) The bushing is rotatably housed in one of the facing steel materials in the through hole located at the overlapping portion of the steel materials to be joined to each other. The outer diameter of the bushing is substantially the same as the inner diameter of the through hole. The bushing has an insertion hole eccentric to the rotation shaft.
(3) A pin, a rivet or a straddle extending over the bushing insertion hole and the through hole in a state where the insertion hole of the bushing provided in one of the steel materials joined to each other and the through hole formed in the other are aligned. The joining is performed by inserting a connecting tool such as a bolt.

According to a third aspect of the present invention, it is preferable that a hardening material is injected between a through-hole formed in the other steel material to be joined to each other and the connecting tool such as the pin, rivet or bolt. It is a feature. .

The invention according to a fourth aspect is characterized in that the bushing is formed with a flange at one end in the axial direction.

The invention according to claim 5 is characterized in that at least one of the inside of the flange formed in the bushing and the peripheral edge of the through hole with which the flange abuts is roughened.

The invention according to claim 6 is characterized in that the insertion hole formed in the bushing is formed so as to avoid the rotation shaft of the bushing.

The invention according to claim 7 is characterized in that the overlapping portion of the steel material is extremely thicker than other portions.

In the invention according to claim 8, the extremely thick portion is:
A reinforcing plate is provided separately from the steel material, and the reinforcing plate is fillet welded to the steel material.

According to a ninth aspect of the present invention, the steel material is a C-shaped steel or an H-shaped steel, and the reinforcing plate is fitted so as to contact the web of the C-shaped steel or the H-shaped steel and the inner surfaces of the upper and lower flanges. It is characterized by having been done.

According to a tenth aspect of the present invention, the steel material is
It is characterized in that a plurality of pieces are installed along the inner peripheral surface of the excavation of the tunnel to form a tunnel lining body and are joined to each other at a contact surface with an adjacent segment.

[0020] In the invention according to claim 11, the steel material comprises:
The first plate integrated with the pillar and the first plate face each other in close or close proximity to each other, and are a beam or a second plate integrated with the beam. And

According to a twelfth aspect of the present invention, there is provided a rotating body used in the structure for joining steel materials according to any one of the first to eleventh aspects, wherein the rotating body is rotatable in a through hole formed in the steel materials joined to each other. And an insertion hole whose outer diameter is substantially the same as the inner diameter of the through hole and which is eccentric to the rotation shaft is formed.

[0022]

Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the steel connection structure according to this embodiment is formed by digging a plurality of tunnels 2 having a rectangular cross section formed by steel segments 1 along an outer peripheral portion of a planned cross section. The present invention relates to a structure for excavating while stopping water between adjacent segments 1 and 1 and connecting both.

The segments 1 and 1 are made of steel formed by welding steel members such as H-section steel and steel plates such as steel plates. The segments 1 and 1 are reinforced by reinforcing ribs or the like, and can withstand the load from the surrounding ground. It has a strong structure that can withstand.

The structure for connecting the segments 1 and 1 is made of a C-shaped steel or an H-shaped steel straddling between the segments 1 and 1, as shown in FIG. The connecting material 3 (in the present embodiment, a C-shaped steel) is applied. In the overlapping portions of the steel shells 1A, 1A constituting the segments 1, 1 and the connecting member 3, a plurality of (in this embodiment, a total of four arranged in 2 × 2) through holes 5, 6 are formed. Is formed at a position where a part thereof is overlapped. All the through holes 5 and 6 have a circular cross section. In this embodiment, all the through holes 5 and 6 have the same diameter.
Different diameters may be used. In the example of FIG. 2, the positions of the through-hole 5 formed in the steel shell 1 </ b> A on the segment 1 side and the through-hole 6 formed in the connecting member 3 are aligned.

Inside the steel shell 1A and the inside of the connecting member 3, connecting plates 7, 8 having the same plane shape as the overlapping portion of the steel shell 1A and the connecting member 3 and having an extremely large thickness are arranged. ing. The connection plate 8 on the side of the connecting member 3 is fitted on the inner surfaces of the web and the upper and lower flanges and is fillet welded on all surfaces. Through holes 9 and 10 are formed in the connection plates 7 and 8 at positions matching the steel shells 1A and 1A or the connecting member 3, respectively.

In each of the through holes 5 and 6,
A bushing 11 or 12 having the form shown in FIGS. 3A and 3B or FIGS. 4A and 4B is fitted (in FIG. 2, the bushing 11 is fitted). The inner diameters of the through holes 5 and 6 substantially match the outer diameters of the bushings 11 and 12, and the bushings 11 and 12 are rotatable with respect to the connection plates 7 and 8. In order to enable such rotation, the thickness of the bushings 11, 12 is slightly smaller than the total of the thickness of the connection plates 7, 8 and the steel shell 1A or the connecting member 3.

The bushings 11 and 12 are formed with through holes 13 extending in the axial direction eccentric to the center of rotation. The bushing 11 has a flange 11a, and the bushing 12 does not have a flange. These bushings are used as appropriate. In the example of FIGS. 3 and 4, since the insertion holes 13 are arranged outside the rotation centers of the bushings 11 and 12, the bushing 1
When the first and second rotations are performed, the absolute position of the insertion hole 13 changes around the rotation center, but the eccentricity is arbitrary in the present invention. In this embodiment, even if the position of the through hole 5 on the segment 1 side and the position of the through hole 6 of the connecting member 3 are shifted, as long as the through holes 5 and 6 have a larger overlap than the insertion hole 13, FIG. As shown in (a), (b) and (c),
By appropriately rotating the bushings 11, 12, the insertion holes 13 formed in each can be aligned.

FIGS. 6 (a), 6 (b) and 6 (c) show, in order, a method of implementing a steel joint structure according to the present invention. That is, first, as shown in FIG. 1A, the connecting member 3 is applied horizontally between the steel shells 1A, 1A of the adjacent segments 1, 1, and as shown by the two-dot chain line in FIG. Temporarily fix using. In this example, the right segment 1 is slightly displaced upward with respect to the left segment 1. When the connecting member 3 is applied, its height position or inclination is arbitrarily set so that as many (preferably all) of the through holes 5 and 6 as possible have an overlap larger than that of the insertion hole 13.

Next, one steel shell 1A (left side in FIG. 6)
The bushings 11 or 12 are fitted into all the through holes 9 and 10 formed in the connection plates 7 and 8 provided in the overlapping portion of the connecting member 3 and the connecting member 3. In this example, the bushing is fitted after the connecting material is temporarily fixed, but may be fitted before the temporary fixing. Then, by appropriately rotating the bushings 11 and 12, the insertion holes 13 and 13 are aligned with each other, the bolt B is inserted into the insertion holes 13 and the nut N is fastened.

Further, the other steel shell 1A (right side in the figure)
Similarly, in the overlapping portion of the connecting member 3 and the bushing 11 or 12, the bushing 11 or 12 is fitted into all the through holes 5 and 6, and the bushing 11 and 12 are appropriately rotated to align the two through holes 13 and 13. And insert the bolt B to the nut N
To conclude.

After that, the bolts and nuts are fully tightened, so that the two adjacent segments 1 and 1 are rigidly connected to each other via the connecting member 3, and the metal shell effect of the steel shell 1 A and the connecting member 3 efficiently increases the stress. Communication can be performed. In the present embodiment, since the connection plate 8 is fitted and arranged so as to contact the inner surfaces of the upper and lower flanges of the C-section steel or the H-section steel, and since the plates 7 and 8 are welded by fillet welding, stress transmission is performed. Is assured. It is needless to say that instead of the bolts B and the nuts N, other connecting tools such as pins and rivets may be used.

As described above, according to the present invention, it is possible to reduce the number of bolt fastening points and suppress cross-sectional defects without the need for the work of placing concrete as in the prior art.

As described above, the through hole 5 on the segment 1 side
Even if the position of the through hole 6 of the connecting member 3 is shifted, the insertion holes 13 formed in the bushing 11 can be aligned by rotating the bushings 11 and 12 appropriately.
The steel shells 1A, 1A of the segment 1 can be rigidly connected via the connecting member 3.

FIGS. 7 to 12 show that even if the relative positions of the adjacent segments 1, 1 are shifted in various manners, these segment steel shells 1A, 1A can be rigidly joined. I have. Hereinafter, “high, low, wide, narrow” means high, low, wide, and narrow with respect to a previously planned position, respectively.

FIG. 7 shows the case where the steel shell 1A located on the right side is slightly higher than the steel shell 1A located on the left side, and FIG. 8 shows the case where it is slightly lower. 7 and 8, the connecting members 3 are arranged in a horizontal state, and the positional relationship shown on the right side of the dashed line indicates the maximum height difference in the drawings when the connecting members 3 are arranged in a horizontal state.

On the other hand, FIGS. 9 and 10 show the case where the steel shell 1A located on the right side is significantly higher and the case where the steel shell 1A located on the right side is significantly lower than the steel shell 1A located on the left side.
In such a case, it is often difficult to align the insertion holes 13 and 13 of the bushings 11 and 12 with the connecting member 3 kept in a horizontal state, so that the former rises to the right and the latter rises to the left. The overlap of the through holes 9 and 10 (the bushings 11 and 12) is ensured by inclining the connecting member 3. Even in such a case, the bushings 11, 12
Therefore, the segments 1 and 1 can be rigidly joined.

FIGS. 11 and 12 show steel shells 1 located on the left and right.
A and 1A show a case where the interval is wide and a case where it is narrow, respectively.

7 to 12, the steel shells 1A, 1A of the adjacent segments 1, 1 in the same vertical plane are shown.
The relative position of the steel shell 1A is described as being shifted from the design position. However, when the relative position of the steel shell 1A is shifted in the axial direction of the tunnel, that is, in the direction perpendicular to the plane of FIG. 1 and FIG. By interposing a spacer, which is a plate-like steel material having a predetermined thickness, between the connecting member 3 and the connecting member 3, it is possible to easily cope with the problem.

Here, the spacer may be a plate-like steel material as described above, or may be formed by fitting and connecting a very thick connection plate in the upper and lower flanges of the H-section steel. Or a combination of a plate-like steel material with the above.

FIG. 13 shows a modification of the present invention. First, in the figure, a plate 20 whose surface has been subjected to friction processing is interposed between the steel shell 1A and the connecting member 3. In the figure, reference numeral 21 shown at the lower left indicates a washer, which can be used in combination with the bushing 12. In addition, the example shown on the upper left is joined to the bushing shown on the upper right without passing through the bushing, and the example shown on the right is another one in which the surface facing the end face of the plate 7 is subjected to friction processing. A plate 22 is further assigned. In the example shown at the lower right, an injection port 22a for injecting a curing agent such as a graft is formed in the plate 22, and a graft chamber 23 communicating with the injection port 22a is formed in the plate 7. According to each of the above examples, the same effect as in the above-described embodiment can be obtained. The modification shown in FIG. 13 can be implemented by arbitrarily combining one or more of the above-described or other embodiments described later, and examples relating to these combinations are also included in the scope of the present invention. It is included in.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified and adopted within the scope of the structure described in each claim. For example, fillet welding of the connection plates 7 and 8 is not essential in the present invention, and may be merely fitted, or in the case of a form that cannot be fitted, only applied to the inner surface of the steel material. There may be. Further, a thick portion corresponding to the plate may be formed in the steel shell 1A or the connecting member 3 without using the connection plate.

It is preferable that at least one of the inside of the flange 11a formed on the bushings 11 and 12 and the peripheral edge of the through hole with which the flange 11a abuts is roughened.

Each of the bushings 11 and 12 may be provided with a sub bushing eccentric to the center of rotation thereof so as to be rotatable with respect to the bushing, and the insertion hole 13 may be provided eccentric to the center of rotation of the sub bushing. In this case, fine adjustment between the two steel materials to be joined can be achieved.

Also, although the description has been given of the case where the joining structure of the present invention is employed for connecting and integrating segments in the circumferential direction of the tunnel in order to provide a lining body in a shield tunnel having a rectangular cross section, Can be used for connection and integration in the axial direction, and can be employed to provide a lining body having not only a rectangular cross section but also a circular or other cross sectional shape.

The joining structure of the present invention and the bushing used in the joining structure are used not only for the shield method but also for connecting and integrating segments used in other tunnel methods such as a tunnel method using a tunnel machine. You can also.

Further, the joint structure of the present invention and the bushing used for the same are a joint structure for joining columns and beams integrated with each other to join columns and beams, and a truss-type bridge. The present invention can also be applied to a joint structure in which steel materials are joined to construct a structure.

[0047]

As described above in detail, according to the joint structure of steel material and the bushing used in the same according to the present invention, it is necessary to cast concrete after a large number of reinforcing bars or to perform a troublesome operation. In addition, the joining and integrating work of the two steel materials can be easily performed, and the stress can be efficiently transmitted without insufficient strength due to the metal touch effect.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a large underground structure to which the present invention is applied.

FIG. 2 is an enlarged sectional view of a part A in FIG. 1;

FIG. 3A is a sectional view of a bushing according to the present invention,
(B) is the same top view.

FIG. 4A is a cross-sectional view illustrating another example of a bushing,
(B) is the same top view.

FIGS. 5A, 5B, and 5C are explanatory diagrams of the operation of the bushing.

6 (a), 6 (b) and 6 (c) are side views showing the operation procedure of the present invention.

FIG. 7 is a model side view for explaining the operation of the present invention.

FIG. 8 is a model side view for explaining the operation of the present invention.

FIG. 9 is a model side view for explaining the operation of the present invention.

FIG. 10 is a model side view for explaining the operation of the present invention.

FIG. 11 is a model side view for explaining the operation of the present invention.

FIG. 12 is a model side view for explaining the operation of the present invention.

FIG. 13 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 1A steel shell 3 connecting material 5, 6 through hole 7, 8 connection plate 9, 10 through hole 11, 12 bushing 13 insertion hole B bolt N nut

Claims (12)

[Claims] 1. A joint structure for steel materials, which satisfies the following requirements (1) to (3) and is characterized in that a plurality of steel materials are joined in a face-to-face state close to or close to each other. (1) One or a plurality of through holes are formed in each steel material, and at least one of the through holes is located at an overlapping portion of the steel materials when the steel materials to be joined to each other are overlapped. . The through hole has a circular cross section. (2) The bushing is rotatably housed in at least one of the facing steel materials in the through-hole located at the overlapping portion of the steel materials joined to each other. The outer diameter of the bushing is substantially the same as the inner diameter of the through hole. The bushing has an insertion hole eccentric to the rotation shaft. (3) A joint such as a pin, a rivet, or a bolt is inserted across a plurality of insertion holes in a state where the insertion holes of the bushings provided in at least one of the steel materials to be joined are aligned. Will be 2. A joint structure for steel materials, which satisfies the following requirements (1) to (3) and is characterized in that a plurality of steel materials are joined in a face-to-face state close to or close to each other. (1) One or a plurality of through holes are formed in each steel material, and at least one of the through holes is located at an overlapping portion of the steel materials when the steel materials to be joined to each other are overlapped. . The through hole has a circular cross section. (2) The bushing is rotatably housed in one of the facing steel materials in the through hole located at the overlapping portion of the steel materials to be joined to each other. The outer diameter of the bushing is substantially the same as the inner diameter of the through hole. The bushing has an insertion hole eccentric to the rotation shaft. (3) A pin, a rivet or a straddle extending over the bushing insertion hole and the through hole in a state where the insertion hole of the bushing provided in one of the steel materials joined to each other and the through hole formed in the other are aligned. The joining is performed by inserting a connecting tool such as a bolt. 3. A hardening material is injected between a through-hole formed in the other steel material to be joined to each other and a connecting tool such as the pin, rivet or bolt. The joining structure of steel materials according to any one of the above. 4. The joint structure for a steel material according to claim 1, wherein the bushing has a flange formed at one end in an axial direction. 5. The surface of at least one of a flange formed in the bushing and a peripheral edge of a through hole with which the flange abuts is roughened. The joining structure of steel materials according to the paragraph. 6. An insertion hole formed in the bushing,
The joint structure for steel materials according to any one of claims 1 to 5, wherein the joint structure is formed so as to avoid the rotation shaft of the bushing. 7. The joint structure for a steel material according to claim 1, wherein the overlapping portion of the steel material is extremely thicker than other portions. 8. The steel plate according to claim 7, wherein the extra-thick portion is a reinforcing plate separate from the steel material, and the reinforcing plate is fillet welded to the steel material. Steel joint structure. 9. The steel material is a C-beam or an H-beam,
The steel joint structure according to claim 7 or 8, wherein the reinforcing plate is fitted and arranged so as to be in contact with the web of the C-shaped steel or the H-shaped steel and the inner surfaces of the upper and lower flanges. 10. A plurality of steel materials are provided along the inner peripheral surface of the excavation of the tunnel to form a tunnel lining body, and are joined to each other at a contact surface with an adjacent segment. The joint structure for a steel material according to any one of claims 1 to 9, characterized in that: 11. The steel material is in a face-to-face state in which the first plate integrated with the column and the first plate are in close or close proximity to each other, and are integrated with the beam or the beam. 2. The first plate according to claim 1, wherein the second plate is a second plate.
10. The joint structure for a steel material according to any one of items 9 to 9. 12. The steel material joining structure according to claim 1, wherein the steel material is rotatably housed in a through hole formed in the steel materials joined to each other, and has an outer diameter equal to the diameter of the through hole. A bushing characterized in that an insertion hole having substantially the same diameter as the inner diameter of the hole and being eccentric to the rotation axis is formed.